Improving Restaurant Cleanliness, Prices and Profits

A restaurant owner says that his customers seemed more concerned about price than cleanliness.
My view is that a customer will rarely tell staff about cleanliness.

My son who is in marketing said that when you see a dirty restaurant you refuse to pay high prices; you expect a high-price restaurant to be clean.

I think this is because you think the restaurant can afford cleaners, and because you will pay more to get cleanliness.

One restaurant manager told me that if you criticize your staff, they complain to head office that you are being bossy.

My son says if the owner is on the premises, he's in charge. He can tell the staff what to do.

One restaurant owner said it's hard to make money in his area because rents are high and there are lots of restaurants.

My son said then look at the other restaurants and see which ones are full (I think you have to know whether that full restaurant is making money - but if it's just being full that makes your profit, that's what you look at). See their prices, their cleanliness, their menu choice, and copy what they are doing.